- No one really knows
some E. atriventris don't have a black belly Leads to the question
Look for evidence of differentiation by examining external morphology
| Specimen | DNA. | X | locality | haplotype | SL.mm. | sex | fifth_fourth_ratio | pelvic_length | membrane_length | branches | jaw_eye |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ROM 92305 | no | Papua New Guinea | east | 17.9 | male | 0.79 | 3.5 | 0.75 | 2 | anterior margin of pupil | |
| ROM 92305 | no | Papua New Guinea | east | 14.5 | male | 0.50 | 4.0 | 0.75 | 2 | anterior margin of pupil | |
| ROM 92305 | no | Papua New Guinea | east | 14.3 | male | 0.50 | NA | 0.75 | NA | anterior margin of pupil | |
| ROM 92309 | no | Papua New Guinea | east | 16.2 | female | 0.50 | 3.5 | 0.75 | 2 | middle of pupil | |
| ROM 92309 | no | Papua New Guinea | east | 17.6 | male | NA | NA | NA | NA | middle of pupil | |
| ROM 84482 | no | Palau | west | 17.9 | male | 0.50 | 4.1 | 0.50 | 6 | middle of pupil (see picture) |
knitr::kable(head(separate(morph, Specimen, c("museum", "jar_no.",
"id."), sep = " ")))
| museum | jar_no. | id. | DNA. | X | locality | haplotype | SL.mm. | sex | fifth_fourth_ratio | pelvic_length | membrane_length | branches | jaw_eye |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ROM | 92305 | NA | no | Papua New Guinea | east | 17.9 | male | 0.79 | 3.5 | 0.75 | 2 | anterior margin of pupil | |
| ROM | 92305 | NA | no | Papua New Guinea | east | 14.5 | male | 0.50 | 4.0 | 0.75 | 2 | anterior margin of pupil | |
| ROM | 92305 | NA | no | Papua New Guinea | east | 14.3 | male | 0.50 | NA | 0.75 | NA | anterior margin of pupil | |
| ROM | 92309 | NA | no | Papua New Guinea | east | 16.2 | female | 0.50 | 3.5 | 0.75 | 2 | middle of pupil | |
| ROM | 92309 | NA | no | Papua New Guinea | east | 17.6 | male | NA | NA | NA | NA | middle of pupil | |
| ROM | 84482 | NA | no | Palau | west | 17.9 | male | 0.50 | 4.1 | 0.50 | 6 | middle of pupil (see picture) |
west <- filter(morph, haplotype == "west") east <- filter(morph, haplotype == "east")
## ## Welch Two Sample t-test ## ## data: west$branches and east$branches ## t = 1.9901, df = 32.815, p-value = 0.05497 ## alternative hypothesis: true difference in means is not equal to 0 ## 95 percent confidence interval: ## -0.01727863 1.55061196 ## sample estimates: ## mean of x mean of y ## 3.766667 3.000000
## ## Loadings: ## Comp.1 Comp.2 Comp.3 Comp.4 ## fifth_fourth_ratio 0.558 -0.159 0.738 0.346 ## pelvic_ratio -0.556 0.219 0.672 -0.437 ## fin_membrane 0.596 0.102 -0.794 ## branches -0.157 -0.957 -0.242 ## ## Comp.1 Comp.2 Comp.3 Comp.4 ## SS loadings 1.00 1.00 1.00 1.00 ## Proportion Var 0.25 0.25 0.25 0.25 ## Cumulative Var 0.25 0.50 0.75 1.00
but there are genetic differences
It is hard to tell if they are separate species, since some evidence suggests separation but a taxonomist would use this morphological analysis to argue that they are the same